Clock-pendulum



(No Model.)

A. E. HOTCHKISS.

CLOCK PENDULUM.

N0. 253,288. PatentedVFeb. 7,1882.

UNITED STATES PATENT OFFICE.

ARTHUR E..HOTCHKISS, OF CHESHIRE, CONNECTICUT.

CLOCK-PENDULUM.

SPECIFICATION forming part of Letters Patent No. 253,283, dated February '7, 182, Application filed October S, 1881. (No model.)

4ures of reference marked thereon, which form a part of this specification.

This invention relates to pendulnms for clocks, and it consists, first, in attaching the upper end of' the pendulum-rod tothe verge, or to a collet on the verge-shaft, by inserting the upper end of said pernlnlum-rod in a recess in the side ofsaid verge orcollet, orin a perforation .through the saine; secondly,in perf'orating the side wall of the scalp or shell of' the ball for the reception of the pendulum-rod; thirdly, in giving to the perforations or slots thus formed, or to one of them, and to the corresponding part ofthe pendulum-rod, such shape as to prevent said ball from turning on said rod; fourthly, in perforating said scalp or shell and allowing said perforation or perforations to contain a portion of the metal filiin g, for the purpose of fastening the scalp and filling together, and, finally, in additional details of construction hereinafter set forth.

In the accompanyingdrawings, Figure 1 represents a perspective view of the pend nlumrod, ball, verge, and pivot-rod or verge-shaft. Fig. 2 represents a perspective view of a modified arrangement, in which the pendulum-rod is attached to a fixed collet on the pivot-rod or vergeshaft. Fig. 3 represents a detail view of the scalp or shell. Fig. 4 represents a detail view of a modification ofthe shell having no filling. Fig. 5 represents a detail view of the filling or body of the ball. Fig. 6 represents a detail view of the scalp and filling. Fig. 7 represents a similar view of the pendulum-rod, and Fig. S represents a detail view ofthe verge.

The same letters indicate the same parts in the different gures.

A designates the pivot-rod or verge-shaft, provided with terminal gudgeons a a and verge B, which last consists of a collet and pallets, said collet having attached to its side the laterally-extending pallets C G. This verge has also a recess, b, formed in one side obliquely bf-lowand behind its center, as shown in Fig. S. In the modification shown in Fig. 2 the verge is left without recess, but a recess is made in the collet Z, which is fast on shaft A, which recess receives the bent upper end of rod D. The verge or collet may be perforated instead of being recessed, and a semicircnlar fiange or other piece fixed to the shaft may take the place ofthe collet.

D designates my pendulum-rod, the upper end, d, ofwhich is bent or turned laterally and inserted in the said recess or perforation of the verge or collet. Solder or any other suitable means may be used to complete the fastening.

To perfor-ate a fiat piece like a verge, collet, or flange is less troublesome than to make a recess or perforation in a cylindrical piece like a verge-shaft, so that I gain a decided advantage in eheapness and speed of manufacture. The rod and verge or collet are made independently of one another, in quantities, and easily fitted together.

I have shown a pendulum-rod hentatD; but in many movements I prefer to use a straight rod of any other suitable form. The lower end of said rod is screw-threaded to receive a nut, E, which regulates the pendulum-ball in the usual manner. This hall consists of'a shell or scalp, G, preferably of brass, and a filling or body, F, preferably of lead, cast therein. In order to conveniently attach this filling or body to the scalp without using additional fastening devices, I supply said scalp with molten metal, through holes g g in the side wall, G, of said scalp, and allow said holes to fill with said metal,which, on hardening, forms a very secure attachment between said parts F and G. Said body or filling is then cut away at its middle part, F, to leave room for the pendulum-rod and to lessen the weightofthe ball; or, by using a suitable mold-cap or core in combination with said shell, the body F may be cast at once in its final shape. Of course the molten metal need not be poured in through holes g g, provided it is allowed to fill the same, producing pinsj'f, which are in one piece with said body, as shown in Fig. 4. The metal could be inserted IOO in the shell and perforations by other means than casting-for instance, swaging the metal while in a cold state. The annular side wall, G', of said scalp or'shell is extended farther than usual from the upright wall or plate thereof, and has at top and bottom, respectively, perl'orations or slots g g2,which have an oblong form, and receive the flattened part D3 of pendulum-rod D, that tits thereon, so as to prevent the ball from turning on said rod. By passing the pendulum through the shell or scalp I obtain durable bearings therein and avoid wearing the soft material ot' the nllin g, beside lesser advantages.

Instead of making the holes g g2 oblong, I may make them angular', of irregular form, or one hole may be round and the other hole oblong, angular, or irregular.

rIhe pendulum-rod at the partwhich is in the oblong, angular, or irregular hole or holes should, of course, have a corresponding shape, or some other shapewhich locks with the sides of said hole or holes. Thus the holes may be square and the rod oblong in cross-section, setting into two ofthe angles or corners.

The most satisfactory form of the locking part ofthe rod is the iiattened one shown, the edge ofthe iiattened part being presented to the front t'or the sake of neatness of appearance.

I may omit the filling and the perforations for attachingt-hesame and use a shell ot' thicker metal, as shown in Fig. 4l, the weight of said shell being sufficient to answer as a ball for said pendulum. This form of ball is easily struck up and perforated, and gives far less trouble in manufacture than the solid balls, which require to be cut through from top to bottom.

In place of using pins or studs in one piece v with the lling, I may pass screws or other i'astenings through the perforations in the side wall to hold the said lling.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In combination with a verge, a pendulumrod having its end bent at right angles to its length and inserted in a recess or perforation of the verge, substantially as and for the purpose set forth.

2. A pendulum ball consisting of a perforated scalp or shell and a lling attached thereto by a part of its material extending into the perforation or perforations of said scalp or shell.

3. The collet on the verge-shaft carrying the pallets ofthe escapement and siimioitiiig the pendululns, as set forth.

4. Shell G, provided with an annular side wall, in combination with pendulum-rod D, which has a iiattened or angular part, D3, that pa-sses through said side wall from top to bottom, to prevent the pendulum-ball from turning.

5. A penduhun-rod which is all in one piece, in combination with a shell or scalp, G, through thcside walls ot'which it passes, said rod and the perforations in said scalp being ot such shape as to prevent said shell from turning on said rod.

6. In combination with scalp G, the filling or body F, having pinsfj", which extend into holes g g of said scalp, said parts composing a pendulum-ball, substantially as described.

In testimony whereof I afiix my signature in presence ot' two witnesses.

ARTHUR E. HOTCIIIUSS.

Witnesses:

MILTON C. DooLrr'rLn, HOWARD T. Moss. 

